I'm looking for software that can automatically filter out the harmonics in a sound file.
I'd like to have the option of filtering out harmonics to leave just the noise of the sound.
I saw this: https://www.image-line.com/plugins/Tools/Edison/

There are ways to convert a signal into its spectra (harmonics) in real-time, process it to remove harmonics, and convert it back into a signal. However, they are not perfect and will introduce some distortion.

This is a feature of Kyma when doing spectral processing. You can create versions of the 'voiced' and 'unvoiced' parts. Unvoiced parts are typically the non-harmonic elements. As you can imagine, it is as much art as it is science with a myriad of trade-offs and fine tuning.

As mentioned, Isotope RX is one of the better apps out there for this type of work and, on the cheap, sharp notch filters.

If it is a one-off, send me a private message of what you are looking for and I could try it with Kyma as I wouldn't mind taking a pass at it as a learning exercise. I've been building spectral based instruments lately but not doing more detailed recreation or restoration work.

time stretching software "Paul Stretch" can do this - just flick throuhg the pages of options and you'll find it.
Though - its not the primary function of the software and i cant verify how high quality it is - as i've only tried this feature while mucking about with the program.